Electrical selecting circuits



F. FAVARGER ELECTRIC-AL SELECTING CIRCUITS Filed Jan. 21, 1926 April 22,NBQ

3 Sheets-Sheet l JWWW-tW M 3M ,8 m Q April 22', 1930. F. FAVARGER197559232 ELECTRICAL SELECTING cmcums Filed Jan. 21, 1926 3 Sheets-Sheet2 A ril 22, 1930. F FAVARGER M55212 ELECTRICAL SELECTING IRCUITS I FiledJan. 21, 1926 5 Sheets-Sheet 5 Patented Apr. 22, 1930 UNITED STATESPATENT? OFFICE FRANCOIS IAVABGEB, OI NEUCHATEL, SWITZERLAND, ASSIGNOR,BY A SSIGN MEN'I'S, TO THE TELEREGIS'IER CORPORATION, OF NEW YORK, N.Y., A CORPORA- T1011 01 DELAWARE ELECTRICAL SELECTING CIRCUITSApplication filed .Tanuary'zl, 1926, Serial No.

The invention relates to an electric installation for the distantcontrol by means of selector switches of receiving apparatus such asselectors, counters or indicatin ap- 6 paratus as, for example,apparatus in ic'ating the course of the exchanges.

The installation forming the subject of the invention afl'ords importantadvantages in relation-to other known installations of lo-the same kind,such as is disclosed in British Patent No. 192,055 of 1924. The objectsof this invention include the provision of apparatus of the aboveindicated class which will be adaptable with a wide degree offlexibility to various operating conditions and which will be rapid,accurate and dependable in operation. a

The accompanying drawings show by way of example two embodiments of thesubject of the present invention.

1 shows diagrammatically an installation comprising a singletransmitting station connected to a single receiving station.

Fig. 2 shows the selector switches of a transmitting station, and

- Fig. 3 is a diagram of an installation having two transmittingstations and three receiving stations.

The first embodiment, Figs. 1 and 2, comprises a transmitting station Aand a receiving station B, connected together by two line wires 1, 2,fed by a source of current (battery of accumulators) 3. The transmittingstation A comprises two selector switches 4, 5, electrically coupled toone another, two relays 6, 7, an electric motor 8, two contacts 9' and10 actuated by the armature 11 of the relay 6, three associated contacts12,13, 14, acthated by the armature 15 of the relay 7, a switch 16 and acontact 17 actuated alternately by a pin 18 on a wheel drivenby themotor 8.

The selector switches 4 and 5, Fig. 2, may be of any'suitableconstruction, the body of one being electrically insulated from the bodyof the other. Each selector switch may comprise a certain number ofcontacts 19, 20, 21, 22, 23, 24, 25, 26, or 19', 20', 21, 22', 23',

24', 25', 26, mounted on a ring 27 or 27 of insulating material. Thecontacts of each 82,884, and in Switzerland January 24, 1985.

pointer 32 cooperating with a dial 33. 34 is the detent of the ratchetwheel 30.

The brush 28' of the selector. switch 5 is controlled electrically bythe armature 35 of an electro-magnet 36 through the medium of an impulsepawl actuating the ratchet wheel 30. 38 indicates the detent of theratchet wheel 30'; 39 is the recoil spring of the armature 35. v

Each contact 19, 20, 21, 22, 23, 24, 25, 26,

. of the selector 4 is electrically connected with the correspondingcontacts 19', 20, 21', 22, 23', 24', 25', 26' of the selector 5 by meansof wires 40.

In the diagram illustrated in Fig. 1, the Selector switches 4 and 5 areshown mounted back to back. The'same figure shows moreover how theelectrical connections of the brushes 28, 28, and of the electromagnet36 are efiected.

The receiving station B comprises a selector 41 electrically controlledby an identical means to that controlling the selector switch 5. Theelectro-magnet 42 of the selector 41 is connected to the line wires 1,2. The

brush 43 is controlled by the armature 44 of the electro-magnet 42 andmay contact with any one of the contacts 45to close the circuit of anydesired one of the electro-magnets 46 which may be operated by a localbattery 47 at the receiving station. Itis apparent that.

numerous receiving stations similar to that indicated at B may beconnected to the same line wires 1 and 2. Y

The operation of the arrangement illustrated is as follows.

Assuming that the brushes 28, 28' of the selector switches 4 and 5 arein engagement with contacts 19, 19' then these brushes. will beinterconnected by one of the wires 40 and a circuit will be establishedfrom battery 3, positive pole, through the magnet winding of relay 6,brush 28, contact 19, wire 40, contact 19', brush 28, to the negativepole of the battery. Relay 6 is thus normally energized and maintainsits contacts 9 and 10 normally open.

If the operator moves the crank handle 31 so as to displace the brush28, this circuit of relay 6 will thereupon be interrupted and the relaywill drop out of contacts 9 and 10. It will be gbserved that the closingof the contacts 10 serves to connect the battery to start the motor 8.The motor through suitable gearings as indicated causes a switchoperating pin 18 to be rotated so as alternately open the circuit ofcontacts 16 and close the circuit of contacts 17. The closmg of contacts17 completes a circuit from the battery through contacts 9, the windingof the auxiliary relay 7, contacts 16 and contacts 17 to the batteryreturn connection. Relay 7 thus energized, closes circuits through 1tscontacts 12, 13 and 14. The closing of contacts 12 completes a stickcircuit for the relay 7 running from the battery through contacts 12 and16, coil of relay 7, and back to the battery through contacts 9, thisc1rcu1t being closed as soon as the rotating pin member 18 closes thecontacts 17 This stick circuit rema ns closed until the pin member 18opens the c1rcuit by separating the contacts 16. Accordingly during thatpart of the revolution of the member 18, between the time that 1t closescontacts 17 and opens contacts 16, the relay 7 will remain picked up.Hence, the contacts at 13 and 14 during this interval W111 remainclosed, which contacts respectively serve to connect the battery to theline wires 1 and 2. Therefore, during this interval an impulse will betransmitted over the line.

During the time between the opening of the contacts 16 by the rotatablepin member 18 and the time that the contacts 17 are again closed, therelay 7 will remain deenergized. Therefore, upon continued rotation ofthe member 18 a series of spaced impulses may be imparted to the line1-2. If the contacts 16 and 17 are operated when the rotatable pin 18 isat diametrically opposite positions, then the impulses imparted to theline 1-2 will be of equal durations and also spaced apart by intervalsof the same duration, and the length of the impulses in respect to theduration of the interruptions may be determined or varied by therelative positions of the contacts 16 and 17.

These line impulses will serve to energize the electromagnets as at 42of any selectors connected to the line, and also electromagnet 36 of theselector switch 5. The selector brushes as at 43 and also the selectorswitch brush 28' will thus be. moved step by step thus closin thecircuits.

into successive engagement with their respective contacts.

Assuming that the operator has moved the crank handle 31 to bring thebrush of selector switch 4 into en agement with contact 26, then after asu cient number of impulses have been imparted to the magnet 36 to stepthe brush 28 into engagement with contact 26, the holding circuit ofrelay 6 will be reestablished through one of the wires 40. The contacts9 being separated again at this moment, the relay 7 will be deenergized,thus preventing the transmission of any further impulses and thestepping magnets as at 36 an 42 will cease to be lmpulsively energized.Thus a number of impulses will be transmitted corresponding to theextent of movement which has been imparted to the crank handle 31. Thatis, if the brush 28 has been moved from contact 19 to contact 26, atotal of 7 impulses will be transmitted during the time that thestepping magnet 36 advances the brush 28 over the corresponding 7contacts on the selector switch 5. The apparatus will then be at restready for the transmission of the next selective group of impulses.

The transmission of impulses may be alternatively controlled from anyone of several transmitting stations according to an embodiment of theinvention shown in Fi 3, comprising two transmitting stations, 5 and Aand three receivin stations, B, B and B These latter are 0 the same typeas the apparatus B described with reference to Fig. 1. The same remarkap lies, with the exception of some details 0 construction, to thetransmitting stations A and A. Each of these stations, like the stationA, described with reference to Fig. 1, comprise two associated selectorswitches 4 and 5, a motor 8 actuating a switch 16 and a contact 17, abattery 3, two relays 6 and 7 and the associated contacts 9, 10 or 12,13, 14, controlled by these relays.

Furthermore, in this embodiment the manually controlled selector switch4 of each transmitting station may also be equipped with electriccontrolling mechanism, as shown in Fig. 3, similar to that whichactuates the selector switch 5. This mechanism comprises thus anelectro-magnet 48, the armature 49 of which controls the contact brush28 of the selector switch 4. The exciting circuit 50 of theelectro-magnet 48 is opened and closed by means of a contact 51associated with the contacts 9 and 10 and actuated by the relay Thecontact 51 is closed when the relay 6 is excited; it is opened as soonas this relay is no longer traversed by a stop current, which occurseach time the manual control of the selector switch 4 of thetransmitting station, to which the relay belongs, is o erated.

e contact 51 has for its object to inter- III rupt the exciting circuitof the electro-magmoving means from the line circuit during net 48 ofthe transmitting station, serving for control, that is to say, when theselector switch 4 is controlled by hand, in such manner that theelectric controlling mechanism of this selector switch may be put out ofaction during operation, so that the latterwill not advance in relationto the other selectors of the installation.

As a result the positions of all the selectors and selector switches ofthe installation will again be in perfect correspondence after eachdisplacement which the operator communicates to the manually controlledselector switch of a transmitting station, assuming that anytransmitting station which is not served with manual control functionsas a receiving station.

While the invention has been described in detail with respect to certainparticular preferred examples which give satisfactory results, it willbe understood by those skilled in the art, after understanding theinvention, that various changes and modifications may be made wthoutdeparting from the spirit and scope of the invention, and it is intendedtherefore in the appended claim to cover all such changes andmodifications.

What is claimed as new and desired to'be secured by Letters Patent ofthe United States is In an impulse transmitting arrangement for thedistant control of indicators associ-' ated with a line circuit, aplurality of similar impulse transmitting devlces, each comprising, amultiposition selector switch manually movable to different positions, asecond movable multiposition selector switch, means whereby the secondselector switch is moved from position to position in response toimpulses applied to the line circuit, means whereby the first selectorswitch is additionally moved from position to position in response to imulses applied to the line circuit, a relay aving a circuit controlled bythe relative positions of said two selector switches, means including asecond relay controlled by the operation of the first relay when theselector switches are moved out of coincidence for applying a number ofimpulses to the line circuit proportional to the amount of relativemovement of the selector switches, whereby when any one of the manuallyoperated selector switches is moved relatively to the second selectorswitches, the first and second relays cooperate to supply the linecircuitwith a number of impulses proportional to the amount of movementand thereby also cause the operation of the impulse responsive movingmeans of each first and second selector switches, and means controlledby the first relay of a selector switch which is at the time controllingthe supply of impulses to the line circuit to disassociate itsassociated additional impulse responsive the operation of such relay.

In testimony whereof I have signed my name to this specification.

FRANCOIS FAVARGER.

